CN106273160A - A kind of thin-walled rapid molding device and system - Google Patents
A kind of thin-walled rapid molding device and system Download PDFInfo
- Publication number
- CN106273160A CN106273160A CN201610974749.5A CN201610974749A CN106273160A CN 106273160 A CN106273160 A CN 106273160A CN 201610974749 A CN201610974749 A CN 201610974749A CN 106273160 A CN106273160 A CN 106273160A
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- China
- Prior art keywords
- core rod
- thin
- walled
- mould bases
- molding device
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/56—Compression moulding under special conditions, e.g. vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
- B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/56—Compression moulding under special conditions, e.g. vacuum
- B29C2043/561—Compression moulding under special conditions, e.g. vacuum under vacuum conditions
- B29C2043/563—Compression moulding under special conditions, e.g. vacuum under vacuum conditions combined with mechanical pressure, i.e. mould plates, rams, stampers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of thin-walled rapid molding device and system, belong to plastics material rapid shaping field.This thin-walled rapid molding device includes mould bases, core rod and pressurizing unit.Mould bases includes the first mould bases and the second mould bases, and core rod includes the first core rod and the second core rod, and the first core rod is installed on the first mould bases, and the second core rod is installed on the second mould bases, the first core rod and the second core rod and complements each other to form die cavity.Pressurizing unit through the second mould bases and with stretch into die cavity, for promote the second core rod move towards the first core rod.The invention still further relates to a kind of thin-walled rapid prototyping system.Utilize thin-walled rapid molding device that the present invention provides and system can quickly realize plastics material thin wall molding, improve product quality, provide effective technical support for realizing product diversity.
Description
Technical field
The present invention relates to plastics material rapid shaping field, in particular to a kind of thin-walled rapid molding device and
System.
Background technology
Rapid shaping technique is a kind of new manufacture across multidisciplinary field, is for manufacturing business's new product development
One key technology of service, to promoting that enterprise product innovation, shortening new product development cycle, raising product competitiveness have actively
Impetus.
Applicant of the present invention finds in long-term practical work, existing rapid molding device, especially thin-walled material
Material shaped device, its thin-wall product produced does not reaches certain thickness, affects product quality.
Summary of the invention
It is an object of the invention to provide a kind of thin-walled rapid molding device, it can provide steady quality for plastic material
Shaping thin wall.
Another object of the present invention is to provide a kind of thin-walled rapid prototyping system, it can provide quality for plastic material
Stable shaping thin wall.
Embodiments of the invention are achieved in that a kind of thin-walled rapid molding device, fill including mould bases, core rod and extruding
Put.Mould bases includes the first mould bases and the second mould bases, and core rod includes the first core rod and the second core rod, and the first core rod is installed on the first mould
Frame, the second core rod is installed on the second mould bases, the first core rod and the second core rod and complements each other to form die cavity.Pressurizing unit passes second
Mould bases and with stretch into die cavity, pressurizing unit for promote the second core rod move towards the first core rod.
In the preferred embodiment, above-mentioned pressurizing unit includes extrusion and actuator, extrusion and actuator
Connect, extrusion through the second mould bases and with stretch into die cavity.
In the preferred embodiment, above-mentioned extrusion is multiple, and actuator is substrate, and multiple extrusions are distributed in
On substrate.
In the preferred embodiment, aforesaid substrate is provided with ejection piece away from the side of extrusion.
In the preferred embodiment, above-mentioned extrusion is square with the cross sectional shape of ejection piece.
In the preferred embodiment, above-mentioned second mould bases is also installed with bearing type die set guide pin, the first mould bases energy
Move in direction along bearing type die set guide pin.
In the preferred embodiment, the cross sectional shape of above-mentioned bearing type die set guide pin is circular.
In the preferred embodiment, above-mentioned thin-walled rapid molding device also includes the air-breathing dress connected with die cavity
Put.
In the preferred embodiment, above-mentioned thin-walled rapid molding device also includes segregation apparatus, segregation apparatus bag
Including pneumatic member and blank, pneumatic member is connected with blank, and pneumatic member and the first mould bases connect, and pneumatic member is used for pushing up crush-cutting broken piece
To cut off stub bar.
Present invention also offers a kind of thin-walled rapid prototyping system, including controlling device and thin-walled rapid molding device.Should
Thin-walled rapid molding device includes mould bases, core rod and pressurizing unit.Mould bases includes the first mould bases and the second mould bases, and core rod includes
One core rod and the second core rod, the first core rod is installed on the first mould bases, and the second core rod is installed on the second mould bases, the first core rod and second
Core rod complements each other to form die cavity.Pressurizing unit through the second mould bases and with stretch into die cavity, pressurizing unit for promote the second mould
Core moves towards the first core rod.Control device and the second mould bases connects.
The embodiment of the present invention provides the benefit that: the moulding material of hot melt state enters into the first core rod and the second core rod is joined
Close the die cavity formed, and be gradually paved with full whole die cavity region.Pressurizing unit or slightly does after postponing that (time delay can simultaneously
Adjust) to the moulding material in extruded product shaping area, thus realize the thin wall profile molding of stability and high efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other relevant accompanying drawings.
The structural representation of the thin-walled rapid molding device that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the pressurizing unit of the thin-walled rapid molding device that Fig. 2 provides for the embodiment of the present invention；
The position view of the getter device of the thin-walled rapid molding device that Fig. 3 provides for the embodiment of the present invention；
The structural representation of the getter device of the thin-walled rapid molding device that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 is the schematic enlarged-scale view of segregation apparatus at V in Fig. 1.
Icon: 100-thin-walled rapid molding device；110-mould bases；111-the first mould bases；1111-glue-feeder；113-second
Mould bases；1131-bearing type die set guide pin；130-core rod；131-the first core rod；133-the second core rod；150-pressurizing unit；151-extrudes
Part；153-actuator；155-ejection piece；170-getter device；173-the first air-breathing part；175-the second air-breathing part；177-air-breathing
Valve；190-segregation apparatus；191-pneumatic member；193-blank.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Generally implement with the present invention illustrated described in accompanying drawing herein
The assembly of example can be arranged with various different configurations and design.
Therefore, detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed below
The scope of the present invention, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.
In describing the invention, it should be noted that term " on ", " interior ", " outward ", etc. the orientation of instruction or position close
System is based on orientation shown in the drawings or position relationship, or orientation or the position usually put when this invention product uses are closed
System, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must have
Specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Describe additionally, term " first " and " second " etc. are only used for distinguishing, and it is not intended that indicate or imply relatively heavy
The property wanted.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " arrange ",
" install ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or connect integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be directly connected to, it is also possible to be indirectly connected with by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Below in conjunction with the accompanying drawings, embodiments of the present invention are elaborated.
Refer to Fig. 1, present embodiments provide a kind of thin-walled rapid molding device 100, including mould bases 110, core rod 130,
Pressurizing unit 150, getter device 170 and segregation apparatus 190.The position of core rod 130 is in mould bases 110, pressurizing unit 150 with
Core rod 130 connects.A part for getter device 170 is surrounded on the outside of mould bases 110, and segregation apparatus 190 is connected with mould bases 110.
Mould bases 110 includes the first mould bases 111 and the second mould bases 113, and the first mould bases 111 cooperates with the second mould bases 113.
Being provided with bearing type die set guide pin 1131 on second mould bases 113, the first mould bases 111 can move along bearing type die set guide pin 1131.
Bearing type die set guide pin 1,131 1 aspect can limit the direction of motion of the first mould bases 111, on the other hand also has the first mould bases
111 and second effect that link together of mould bases 113.
In the present embodiment, the quantity of bearing type die set guide pin 1131 is four.Certainly, in other embodiments of the invention, also
Can be other quantity, such as two.
Core rod 130 includes the first core rod 131 and the second core rod 133, and the first core rod 131 is connected with the first mould bases 111, second
Core rod 133 is connected with the second mould bases 113.First core rod 131 complements each other to form die cavity with the second core rod 133 and (does not marks in figure
Number).Second core rod 133 can move towards the first core rod 131 under the promotion of pressurizing unit 150.
First core rod 131 and the second core rod 133 the formed die cavity that cooperates is that thin-walled rapid molding device 100 is carried out
The working region of plastic material shaping thin wall.
It is additionally provided with multiple cooling water channel hole (non-label in figure) on first core rod 131 and the second core rod 133, is conducive to working as
When thin-walled rapid molding device 100 works, the temperature to core rod is adjusted.
Being provided with glue-feeder 1111 on the first mould bases 111, the plastic material of hot melt state is entered by glue-feeder 1111
In die cavity.
Refer to Fig. 2, pressurizing unit 150 through the second mould bases 113 and with stretch into die cavity, pressurizing unit 150 is used for promoting
Second core rod 133 moves towards the first core rod 131.Pressurizing unit 150 includes extrusion 151, actuator 153 and ejection piece 155.
One end of extrusion 151 is connected with actuator 153, and the other end of extrusion 151 passes the second mould bases 113 and the second core rod 133,
And it extend into die cavity always.
Core rod 130, when pressurizing unit 150 works, is extruded by extrusion 151.Specifically when hot melt state
Plastic material is paved with die cavity, and the second core rod 133 is extruded by extrusion 151, thus realizes marginal not and mould limit and eject.
In the present embodiment, the quantity of extrusion 151 is four.Certainly, in other embodiments of the invention, it is also possible to
For other quantity, such as two.
In the present embodiment, the cross sectional shape of extrusion 151 is square.Certainly, in other embodiments of the invention,
Can also be other shapes, such as circular.
The most in other embodiments of the invention, extrusion 151 also can the sheathed girth member for strengthening its performance.Should
Girth member can improve the service life of extrusion 151, thus ensures the production efficiency of thin-walled rapid molding device 100.
The effect of actuator 153 is to drive extrusion 151 to realize the extruding to the second core rod 133.When extrusion 151 is
Time multiple, multiple extrusions 151 can be distributed on actuator 153 in a certain way.
In the present embodiment, actuator 153 is substrate, and this substrate is rectangle.Four extrusions 151 are distributed in rectangle
Substrate is on the position at four angles.
Ejection piece 155 is connected to actuator 153 one end away from extrusion 151, it is simple to power acts on actuator 153.
In the present embodiment, the cross sectional shape of ejection piece 155 is square.Certainly, in other embodiments of the invention,
Can also be other shapes, such as circular.
When thin-walled rapid molding device 100 works, on the one hand, the plastic material of hot melt state is entered by glue-feeder 1111
Entering in die cavity, the most on the other hand, core rod 130 is extruded by pressurizing unit 150.Thin-walled rapid molding device 100 is in work
When making, marginal not is moulded limit and is ejected, thus realizes the rapid shaping of material thin wall.
Referring to Fig. 3 and Fig. 4, getter device 170 includes first air-breathing part the 173, second air-breathing part 175 and admission air valve
177.One end of first air-breathing part 173 is installed in above-mentioned die cavity, and the other end is connected with admission air valve 177.Second air-breathing part 175
One end be installed in above-mentioned die cavity, the other end is connected with admission air valve 177.
First air-breathing part 173 and the second air-breathing part 175 are also respectively provided with the first valve (not shown) and the second valve
(not shown).First valve is for controlling the first air-breathing part 173, and the second valve is for controlling the second air-breathing part 175.
When admission air valve the 177, first valve and the second valve are in open mode, the first air-breathing part 173 and second is inhaled
Gas part 175 is in suction condition.The flow direction of gas is as shown by the arrows in Figure 3.
The effect of getter device 170 is, on the one hand in order to empty the gas in die cavity, reduces and fills resistance, beneficially material
The thin-walled rapid shaping of material；On the other hand, the process of die cavity is entered into when the plastic material of hot melt state passes through glue-feeder 1111
In, getter device 170 keep suction condition make hot melt state plastic material can smooth exuberant formed product district, further
Promote the quality of material thin wall molding.
Referring to Fig. 5, segregation apparatus 190 includes pneumatic member 191 and blank 193, and pneumatic member 191 is with blank 193 even
Connecing, one end away from pneumatic member 191 of blank 193 is stretched in die cavity.
The effect of blank 193 is the side that stub bar is stayed after die sinking the first core rod 131, simultaneously in the effect of mould opening force
Lower stub bar can be flattened cut-out in die sinking moment.Secondly, stub bar is ejected by pneumatic member 191.Stay the product of the second core rod 133 side
Product are taken out by mechanical hand, complete once to produce.
In the present embodiment, blank 193 is bearded needle.Certainly, in other embodiments of the invention, it is also possible to for other
Can be used for the parts separated.
Refer to Fig. 1～Fig. 5, use thin-walled rapid molding device 100 to carry out plastics material thin wall rapid shaping: first
First, the plastic material being in hot melt state enters into the first core rod 131 and the type of the second core rod 133 formation by glue-feeder 1111
Intracavity；In the process, getter device 170 keeps suction condition, on the one hand empties the air in die cavity, reduces resistance, another
Aspect enables the most exuberant die cavity of plastic material of hot melt state；Meanwhile, extrusion 151 is under the effect of ejection piece 155
The plastic material of extrusion pressing type intracavity, it is achieved the thin wall profile molding of stability and high efficiency；Finally, pneumatic member 191 quickly pushes up crush-cutting broken piece
193 to cut off stub bar.
The thin-walled rapid molding device 100 that the present embodiment provides is under the effect of pressurizing unit 150, it is possible to achieve marginal not is moulded
While eject.The moulding material of hot melt state enters into the die cavity that the first core rod 131 cooperatively forms with the second core rod 133, and gradually
It is paved with the full whole die cavity region for formed product.Meanwhile, the forming material in pressurizing unit 150 extruded product shaping area
Material, thus realize the thin wall profile molding of stability and high efficiency.
Another embodiment of the present invention additionally provides a kind of thin-walled rapid prototyping system, and it includes controlling device with above-mentioned
Thin-walled rapid molding device 100, controls device and the second mould bases 113 connects.By controlling device to thin-walled rapid molding device
The production process of 100 is controlled.
The thin-walled rapid prototyping system that the present embodiment provides can realize the thin wall profile molding of stability and high efficiency.
In sum, the present invention provides thin-walled rapid molding device and the moulding material of system hot melt state enter into the
The die cavity that one core rod and the second core rod cooperatively form, and gradually it is paved with full whole die cavity region.Meanwhile, pressurizing unit extruding is produced
Moulding material in product shaping area, thus realize the thin wall profile molding of stability and high efficiency.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a thin-walled rapid molding device, it is characterised in that include that mould bases, core rod and pressurizing unit, described mould bases include
One mould bases and the second mould bases, described core rod includes that the first core rod and the second core rod, described first core rod are installed on described first mould
Frame, described second core rod is installed on described second mould bases, and described first core rod and described second core rod complement each other to form die cavity,
Described pressurizing unit through described second mould bases and with stretch into described die cavity, described pressurizing unit is used for promoting described second core rod
Towards described first core rod motion.
Thin-walled rapid molding device the most according to claim 1, it is characterised in that described pressurizing unit include extrusion and
Actuator, described extrusion is connected with described actuator, and described extrusion is through described second mould bases and stretches into described die cavity.
Thin-walled rapid molding device the most according to claim 2, it is characterised in that described extrusion is multiple, described in drive
Moving part is substrate, and multiple described extrusions are distributed on described substrate.
Thin-walled rapid molding device the most according to claim 3, it is characterised in that described substrate is away from described extrusion
Side is provided with ejection piece.
Thin-walled rapid molding device the most according to claim 4, it is characterised in that described extrusion and described ejection piece
Cross sectional shape is square.
Thin-walled rapid molding device the most according to claim 1, it is characterised in that also fixedly mount on described second mould bases
There are bearing type die set guide pin, described first mould bases can move along the direction of described bearing type die set guide pin.
Thin-walled rapid molding device the most according to claim 6, it is characterised in that the cross sectional shape of described bearing type die set guide pin is
Circular.
8. according to the thin-walled rapid molding device described in any one in claim 1-7, it is characterised in that described thin-walled is quick
Shaped device also includes that getter device, described getter device connect with described die cavity.
9. according to the thin-walled rapid molding device described in any one in claim 1-7, it is characterised in that described thin-walled is quick
Shaped device also includes that segregation apparatus, described segregation apparatus include pneumatic member and blank, described pneumatic member and described blank
Connecting, described pneumatic member is connected with described first mould bases, and described pneumatic member is used for pushing up the described blank of pressure to cut off stub bar.
10. a thin-walled rapid prototyping system, it is characterised in that include controlling device and such as any one in claim 1-9
Described thin-walled rapid molding device, described control device is connected with described second mould bases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610974749.5A CN106273160A (en) | 2016-10-27 | 2016-10-27 | A kind of thin-walled rapid molding device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610974749.5A CN106273160A (en) | 2016-10-27 | 2016-10-27 | A kind of thin-walled rapid molding device and system |
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| CN106273160A true CN106273160A (en) | 2017-01-04 |
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| CN201610974749.5A Pending CN106273160A (en) | 2016-10-27 | 2016-10-27 | A kind of thin-walled rapid molding device and system |
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| CN112810013A (en) * | 2020-12-23 | 2021-05-18 | 浙江祥邦科技股份有限公司 | Stable one-way exhaust system based on automatic manufacture of functional adhesive film and operation method |
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Application publication date: 20170104 |